...
| Code Block | ||
|---|---|---|
| ||
class ShowHeapError {
// ... other methods
static public String readLimitedLine(Reader reader, int limit) throws IOException {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < limit; i++) {
int c = reader.read();
if (c == -1) {
return null;
}
if (((char) c == '\n') || ((char) c == '\r')) {
break;
}
sb.append((char) c);
}
return sb.toString();
}
static public final int lineLengthLimit = 1024;
static public final int lineCountLimit = 1000000;
public void addNames() throws IOException {
try {
String newName;
for (int i = 0; i < lineCountLimit; i++) {
newName = readLimitedLine( reader, lineLengthLimit);
if (newName == null) {
break;
}
if ( || newName.equalsIgnoreCase("quit")) {
break;
}
names.addElement(newName);
System.out.println("adding " + newName);
}
} finally {
input.close();
}
}
}
|
...
| Code Block | ||
|---|---|---|
| ||
class ShowHeapError {
static public final int fileSizeLimit = 1000000;
public ShowHeapError(String filename) throws IOException {
if (Files.size( Paths.get( filename)) > fileSizeLimit) {
throw new IOException("File too large");
}
this.input = new FileReader(filename);
this.reader = new BufferedReader(input);
}
// ...other methods
}
|
...
| Wiki Markup |
|---|
The {{OutOfMemoryError}} can be avoided by ensuring that the absence of infinite loops, memory leaks, and unnecessary object retention. When memory requirements are known ahead of time, the heap size can be tailored to fit the requirements using the following runtime parameters \[[Java 2006|AA. Bibliography#Java 06]\]: |
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<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="d5db3042b2d59373-a054abde-442d4d49-967cb6dd-33f884bd73b3dd15af3348dd"><ac:plain-text-body><![CDATA[ | [ISO/IEC TR 24772:2010 | http://www.aitcnet.org/isai/] | "Resource Exhaustion [XZP]" | ]]></ac:plain-text-body></ac:structured-macro> |
CWE-400, "Uncontrolled Resource Consumption ('Resource Exhaustion')" | ||||
| CWE-770, "Allocation of Resources Without Limits or Throttling" |
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<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="1efd74b56cde9fd2-ce8504ad-4ede4fbb-9077b603-ad560b835540332462d6db19"><ac:plain-text-body><![CDATA[ | [[Sun 2006 | AA. Bibliography#Sun 06]] | [Garbage Collection Ergonomics | http://java.sun.com/javase/6/docs/technotes/guides/vm/gc-ergonomics.html ], "Default values for the Initial and Maximum heap size" | ]]></ac:plain-text-body></ac:structured-macro> |
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="e6d7116a711ca41d-f23a0562-48a44994-b021bafa-462355ff1f85cb08742ae433"><ac:plain-text-body><![CDATA[ | [[Java 2006 | AA. Bibliography#Java 06]] | [java - the Java application launcher | http://java.sun.com/javase/6/docs/technotes/tools/windows/java.html ], "Syntax for increasing the heap size" | ]]></ac:plain-text-body></ac:structured-macro> |
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="aa5d880b6ad11b8d-1cf54c7c-49f64b2c-979aaca1-072355222a6e6dc978adbaf9"><ac:plain-text-body><![CDATA[ | [[Sun 2003 | AA. Bibliography#Sun 03]] | Chapter 5: Tuning the Java Runtime System, [Tuning the Java Heap | http://docs.sun.com/source/817-2180-10/pt_chap5.html#wp57027] | ]]></ac:plain-text-body></ac:structured-macro> |
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="b7e0f70a5d5aee48-d8a9465d-4f1a43a3-b9aa8a7c-30d51c8ece5ec46091aa0f72"><ac:plain-text-body><![CDATA[ | [[API 2006 | AA. Bibliography#API 06]] | Class ObjectInputStream and ObjectOutputStream | ]]></ac:plain-text-body></ac:structured-macro> | |
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="53563d60c7fe66f3-cbe0518d-430b4702-8a5d9fa3-5ffc0b9b4192deafc9055c28"><ac:plain-text-body><![CDATA[ | [[SDN 2008 | AA. Bibliography#SDN 08]] | [Serialization FAQ | http://java.sun.com/javase/technologies/core/basic/serializationFAQ.jsp] | ]]></ac:plain-text-body></ac:structured-macro> |
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